Can you please provide me with insight into why luteal support is recommended during natural FETs if the woman has no infertility factors?
Some background: I'm getting ready for FET (with letrozole & hcg trigger) because of male infertility factor. I'm 32, ovulate regularly with 29 day cycles. I have repeated implantation failure (5 failed eSET transfers--2 chems & 3 neg), an ovarian cyst removed a while back, and an EFT that showed slight receptivity problem, which was hopefully just treated. My doctor strongly recommends luteal support for all FETs with estrace and progesterone suppositories, which I've always done in the past, but I can't get a clear understanding of why--is this done to increase receptivity or just in case I don't produce enough naturally? Any insight would be very helpful!